these 3 derivations will be built:
  /nix/store/2fnfbvzijx14pxw2kgf8hsraq07drdag-treefmt.toml.drv
  /nix/store/2rs9cmyy1asj7i3lgclipgcd4fz7a1vs-treefmt.drv
  /nix/store/qqpsqd7irhivv0qnndm0n9wjgy3i9bsz-treefmt-check.drv